The gap control device to ensure the weld seam welding space meet the requirements, diameter, misalignment and weld gap have been strictly controlled.
采用焊缝间隙控制装置来保证焊缝间隙满足焊接要求，管径，错边量和焊缝间隙都得到严格的控制。
A type of valve, typically found on small-diameter pipework, that incorporates an orifice or flow-restriction device to control fluid flow.
一般用于小直径管道系统的一种阀。它包括一个用于控制流体流动的孔板或限流装置。
The optical cell of supercritical fluid is designed to be small diameter cylinder to sustain high pressure, and be long to arrange the device to control temperature.
由于超临界流体温度和压力较高，用于测量其折射率的光学池需要特殊设计。
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